jnoir/smf-mw-auth — comment on commit 3f02e518a9d6d105573953edfd24fba2958920f3
File: README line 142
By jdarwood007:

This should not need to be done. The check here is done on purpose for verifying the wiki account has the SMF member ID. This attempts to prevent any duplicate name sharing that may occur from the name correction we have to do for characters MediaWiki doesn't support and SMF does (and vice versa).

If this is failing, then when we initially created the user, it didn't set the smf_member_id in their options. We force/retain the smf_member_id on all options updates by making it a hidden forced setting.